Ilton



(No Model.)

J. J. HAMILTON. MEANS FOR CHANGING MGTION.

No. 531,721. Patented Jan. 1, 1895.

Unirse Srnrns nrnnir Orgien@ JONATHAN JOSEPH HAMILTON, OF NEEPAXVA,CANADA.

MEANS FOR CHANGING MOTION.

:PEGIFICATION forming part of Letters Patent No. 531,721, dated January1, 1 895.

'Application led .Tune 2, 1894 Serial No. 513,269. (No model.)

W0 @Hicham it may concern.-

Be it known that I, JONATHAN JOSEPH Hair iLrON, a subject of the Queenof Great Britain, residing at Neepawa, in the county of Beautiful Plainsand Province of Manitoba, Canada, have invented certain new and usefulImprovements in Means for Changing Motion; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvementsin mechanical movements, andparticularly to converting reciprocating motion into rotary motion, orrotary motion into reciprocating motion.

Primarily the object of my invention is to provide a simple and eiectivedevice for reducing the consumption ot' power to a minimum.

A further object is to apply power direct to the drive-shaft, therebymaking the parts very compact by entirely dispensing with the connectingrod between the crosshead and the crank.

The invention consists essentially in providing a reciprocating groovedor cam-actuating cross-head or block which engages two projectionsarranged on the crank-wheel of the drive-shaft by which the said shaftre ceives a rotary motion; or if the power be rotary by means of whichthe said cross-head or grooved block is reciprocated.

My invention further consists in the novel construction and combinationof the several parts as will be more fully hereinafter set forth andthen defined in the claims at the end of the description.

Referring to the accompanying drawings, in which like letters ofreference refer to similar parts, Figure l is a side elevation of theinvention as applied to a steam engine. Fig. 2 is a vertical transversesection taken on the line II--II of Fig. l, illustrating several of theparts in dotted lines. Fig. 3 is a diagrammatic view illustrating thetravel ofthe crank pin or stud, also the line of travel of thecrosshead; and Fig. e is a fragmentary View of a slightly modified formof adjusting block.

In the drawings A designates an engine bed or frame provided with theusual cross-head guides B, which are in alignment with the cylinder C ofthe engine, only sufiicient of said engine being shown to properlyillustrate the working of the invention. Passing through the stntng boxc of the cylinder is thepiston rod or power arm D which has areciprocating movement imparted thereto in any suitable manner. On theouter end of this rod is a cross-head or block E arranged between theguides B, which serve as a bearing therefor. The cross-head E isprovided with the short slots or grooves e and e arranged in the upperand lower portion, respectively, of said cross-head and extending inavertical plane thereof. Arranged in the same plane as the slots ispreferably located a block e2, of rectangular formation, rigidly securedto or formed integrally with the crosshead. This block is centrallylocated on the cross-head or block E and extends partly through the sameand serves to form two channels or grooves e3 and e4, between the edgesof the block and the inner portion of the cross-head for the purpose aswill hereinafter appear. The edges of the block may be slightly curved,as shown at e5 in Fig. 4, if so desired.

F is a crank or drive wheel secured to the drive shaft f in any suitablemanner; the said Wheel having arranged in a radial line from the centerthereof two studs or pins f and f2, preferably provided on their outerends with anti-friction rollers. The stud f" is shorter than the stud f2 allowing the former to pass in front of the block, while the latter isof sufficient length to engage the edge of the block and inner portionof the cross-head, as will presently appear.'

The position of the cross-Ahead as shown in Fig. l, is at its outwardthrow having carried the studf from the point H, Fig. 3, to the pointH', the travel of the cross-head being on a line connecting these twopoints. At the point H', the stud f leaves the slot @,Fig. 1, due to themomentum of the wheel F or of a separate fly wheel Gr secured to theshaft; the said wheel being indicated by dotted lines in said iigure.The stud f2 at this time enters the channel or groove c4 serving toprevent any further movement of the cross-head and retaining same in afixed position during its passage through said groove. Thisserves ICO togradually stop any further movement of the piston rod and finally torigidly hold same during a short period. The momentum of the wheelcarries the stud f over the dead center to the point H2, at which timethe said stud enters the slot e of the cross-head; the the stud f2having passed through the groove e4. At this time the cross-head beginsto return carrying with the stud f from the point H2 to the point H3,the momentum of the wheel again carrying the crank wheel and shaftoverthe other dead center to the point I-I. The stud f2 during thismovement passes through the channel or groove e3 of the crosshead. Theparts are again in position for another revolution which may becontinued thereby imparting a continuous rotary motion to thedrive-shaft f. By this arrangement a much shorter movement may be givento the crosshead and consequently, where a steam engine is used, ashorter cylinder may be used requiring less consumption of steam, andfurthermore, no expenditure of power is required for carrying thedrive-shaft over the dead centers as this is accomplished by themomentum of the drive-wheel or fly-wheel.

Should two engines be used, as in oase of locomotives, the parts will beso arranged that one engine will operate to positively rotate onecrank-wheel as the other wheel of the shaft is passing the dead center.l

It is obvious that I might support the block or cross-head E and thepower-arm D in any suitable manner and that the cross-head may bereciprocated by other means than by a steam engine. I may make the blockc2 and the cross-head adjustable to permit of varying the length ofstroke of said cross-head. Instead of grooves for the passage of thestuds, a cam surface may be provided on the crosshead for actuating thecrank. Other modifications may be made without departing from the spiritof my invention.

Having thus fully described `my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is

l. The combination with the cross-head and means for reciprocating saidcrosshead, of a crank having two projections arranged to projectoutwardly from the same side of said crank, one of the said projectionsadapted to engage grooves to limit the movement of the cross-head andthe other projection adapted to engage slots in said cross-head,substantially as described.

2. The combination with the cylinder, power rod, and reciprocatingcross-head arranged on the power arm, of a crank having two projectionsarranged in the same radial line and projecting outwardly from the sameside of said crank, one ofthe said projections adapted to engage groovesto limit the movement of the cross-head and the other adapted to en gageslots in the cross-head, substantially as described.

3. The combination with the crank having two studs arranged thereon, ofa reciprocating cross-head provided with a slot inthe upper and anotherin the lower portion thereof in which one of the studs is adapted towork, a block arranged in the central portion ofthe cross -head forminga groove on each side thereof for the passage of the other stud and-means for movingthe cross-head, substantially as described.

4. The combination with the cylinder and power-arm, of a cross-headarranged thereon, the said cross-head having a slot inthe upper andanother in the `lower portion thereof, a block centrally located on thecross head forming a groove in the opposite sides, a crank wheel havingtwo studs or pins arranged in the same radial line, one of said studsengaging the slots of said cross-head, while the other stud engages thegrooves formed by the block, substantial] y as described.

In testimony whereof I affix my signatu re in presence of two witnesses.

.I0-NATHAN JOSEPH HAMILTON.

Witnesses:

ALEX. H. HUNTER, W. M. HAMILTON.

